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Charge Transfer Excitation and Asymmetric Energy Transfer at the Interface of Pentacene-Perfluoropentacene Heterostacks
preprintsubmitted on 29.11.2020, 13:58 and posted on 01.12.2020, 08:07 by Anna-Katharina Hansmann, Robin C. Döring, Andre Rinn, Steffen M. Giesen, Melanie Fey, Tobias Breuer, Robert Berger, Gregor Witte, Sangam Chatterjee
The formation pathways of CT-excitons at the model crystalline donor-acceptor interface of pentacene-perfluoropentacene (PEN-PFP) is studied by a combination of advanced experimental and theoretical techniques. More specifically, we compare the one-photon photoluminescence excitation (PLE) and absorption spectra of three different PEN-PFP heterostructures with different molecular alignment at the interface at cryogenic temperatures.